PREPAINTED ALUZINC STEEL IN COIL System 1

PREPAINTED ALUZINC STEEL IN COIL

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Product Description:

Specification

1. Thickness: 0.3-0.8mm

2. Width: 914-1250mm

3. Inner Diameter: 508mm

4. Weight of Steel Coil: 3-15MT

5. Available Dipped Layer: 50-150g/m²

6. Surface Texture: Normal Coated

7. Type of coating structure: 2/1 Coat the top surface of the steel sheet twice, coat the bottom surface once, and bake the sheet twice.

8. Front Side Paint Thickness: 15-25μm (bottom paint+top paint)

9. Back Side Paint Thickness: 5-10μm

Mechanical Properties

1. Mechanical properties of base metals

Grade	Tensile Test
Grade	Yield Strength MPa	Tensile Strength MPa	Elongation A80mm % ≥
SGCC	140-350	270-500	22
SGCD	140-300	270-420	26
SGCE	140-260	270-380	30

2. Common performance of front coating

(1). Thickness: ≥20μm

(2). Pencil Hardness: 2H

(3). 60° specular glossiness of coating: >60

(4). 180°bend: ≤3T

(5). Impact: ≥9J

(6). Salt Fog Resistant: ≥500h

(7). Color difference: <3ΔE

Q: How are steel coils used in the production of steel doors?: Steel coils are used in the production of steel doors as the primary raw material. These coils are unwound and fed into a roll forming machine, where they are shaped into the desired door profile. The steel coils provide the necessary strength, durability, and rigidity to the doors, ensuring they can withstand various external forces and provide security.

Q: I'm currently in an Estimating and Bidding class. I have to estimate two divisions for a multi-million dollar project. The project that I chose is around 6 million dollars and involves constructing a new gas/lighting building. I chose to estimate steel, and my question is, around how much out of the 6 million goes toward just the steel estimate? If it helps, this building is has two floors and is roughly about 100x70 feet. The building not wood construction, but rather steel and brick. How much of that 6 million would go into the steel? I'm not looking for anything exact, just roughly.: That is a little tough to answer given the details. I will try to answer it as best I can. You can send me a message if you need further help and I can get some more details from you. If it is a 6 million dollar project, that is about $428/sf - (6 million divided by 14,000 sf). $428 is a little bit higher end then say, just a Walmart which is a block and steel box. Assuming you have a concrete slab on the first floor, metal deck on the second floor, with steel beams and open web joists framing, steel columns and steel roof framing with a metal deck roof.... you could be approx 10-15% of the total 6 million. Now, this would include the structural steel, not light gauge steel framing for walls. It sounds like you are looking for structural steel, not metal stud framing. Hopefully this helps, I can check back to this thread later to see if you've had to add any more details.

Q: What are the different methods of perforating steel coils?: Various techniques are employed to perforate steel coils, each possessing unique merits and applications. 1. Mechanical Punching: One frequently employed method for perforating steel coils is mechanical punching. This involves utilizing a mechanical press, punch, and die set to puncture holes in the coil. Customization of hole size and shape is achievable by designing the punch and die set accordingly. Mechanical punching is efficient and generates consistent results, producing high-quality holes. 2. Laser Cutting: For intricate designs or complex hole patterns, laser cutting is a sought-after technique to perforate steel coils. A powerful laser beam is employed to precisely and cleanly cut through the coil, creating holes. Hole size, shape, and spacing flexibility are offered by laser cutting, which can be computer-controlled for precise and repeatable outcomes. 3. CNC Plasma Cutting: This method leverages a high-velocity plasma jet to cut through the steel coil and create perforations. CNC technology guides the plasma cutter, ensuring precise and accurate hole patterns. CNC plasma cutting is ideal for thicker steel coils and can generate larger holes compared to laser cutting. 4. Waterjet Cutting: The use of a high-pressure jet of water mixed with an abrasive substance characterizes waterjet cutting for perforating steel coils. This technique allows versatility in terms of hole dimensions, shapes, and compatibility with different materials. Waterjet cutting is renowned for its capability to produce intricate and precise perforations without causing heat-affected zones or distortion. 5. Electrical Discharge Machining (EDM): EDM is an approach that employs electrical discharges to erode the material, forming perforations in the steel coil. It involves the use of a conductive electrode and dielectric fluid to generate controlled sparks, removing material and creating holes. EDM is suitable for creating complex shapes and patterns, particularly on hard materials. The choice of method depends on various factors, including desired hole size and shape, steel coil thickness and type, required precision, and production volume. Each method has its own strengths and limitations, necessitating the selection of the most appropriate technique based on the specific requirements of the perforated steel coils.

Q: How are steel coils used in the production of metal panels?: Steel coils are an essential component in the production of metal panels. These coils, which are typically made from high-quality steel, serve as the raw material for manufacturing various types of metal panels. To begin the production process, the steel coils are first unrolled and flattened using specialized machinery. This allows for a consistent and uniform thickness throughout the sheet. The flattened steel is then cut into the desired length and width, depending on the specific requirements of the metal panel being produced. Once the steel has been cut, it undergoes further processing, such as cleaning and coating. This is done to remove any impurities and protect the steel from corrosion or damage. The coating also enhances the appearance of the metal panel and provides additional durability and longevity. After the cleaning and coating process, the steel sheets are formed into the desired shape using various techniques, such as roll forming or stamping. This allows for the creation of different types of metal panels, including roofing panels, wall panels, and decorative panels, among others. The steel coils used in the production of metal panels are chosen for their strength, durability, and versatility. Steel is known for its excellent structural properties, making it an ideal material for constructing sturdy and long-lasting metal panels. Additionally, steel is highly resistant to environmental factors, such as extreme weather conditions, which further enhances the durability of the metal panels. In conclusion, steel coils play a crucial role in the production of metal panels. They serve as the raw material for manufacturing these panels and undergo various processes to ensure their quality and durability. The use of steel coils allows for the production of a wide range of metal panels that can be used in various industries and applications.

Q: What are the different methods of cut-to-length shearing for steel coils?: There are several methods of cut-to-length shearing for steel coils, each with its own advantages and applications. Some of the commonly used methods are: 1. Rotary Shearing: This method involves the use of a rotating shear blade that cuts through the coil. It offers high precision and can handle a wide range of material thicknesses. Rotary shearing is suitable for high-volume production and can achieve high cutting speeds. 2. Guillotine Shearing: In this method, a straight blade is used to cut through the coil. It is a versatile method that can handle various material thicknesses and widths. Guillotine shearing is relatively simple and efficient, making it a popular choice for many applications. 3. Slitting: Slitting involves making multiple longitudinal cuts in the coil to create narrower strips. It is commonly used when a coil needs to be divided into several smaller coils or when narrower strips are required for specific applications. Slitting can be done using either rotary or straight blades. 4. Laser Cutting: Laser cutting utilizes a high-powered laser beam to melt or vaporize the material, resulting in a clean and precise cut. It is ideal for cutting complex shapes or patterns and can handle both thin and thick steel coils. Laser cutting offers high accuracy and minimal material distortion. 5. Waterjet Cutting: Waterjet cutting uses a high-pressure stream of water mixed with abrasive particles to cut through the coil. This method is suitable for a wide range of materials, including steel, and can achieve high accuracy. Waterjet cutting is often used for cutting thick coils or when heat-affected zones need to be minimized. Each method has its own strengths and limitations, and the choice depends on factors such as material thickness, required precision, production volume, and specific application requirements. The selection of the most appropriate method is crucial to ensure efficient and high-quality cut-to-length shearing for steel coils.

Q: How are steel coils used in the agricultural industry?: Steel coils are used in the agricultural industry for a variety of purposes, including the manufacturing of farm equipment such as tractors, combines, and plows. These coils are also used in the construction of storage tanks, irrigation systems, and fencing materials. Additionally, steel coils are utilized in the production of agricultural buildings and structures like barns, silos, and greenhouses.

Q: How are defects in steel coils detected and resolved?: Defects in steel coils are detected through various methods such as visual inspection, ultrasonic testing, magnetic particle inspection, and eddy current testing. Once a defect is identified, it is resolved through processes like grinding, welding, or cutting out the affected area. In some cases, the entire coil may need to be rejected or sent for further processing to eliminate the defect.

Q: What are the different types of steel coil edges?: There are several different types of steel coil edges, each with its own unique characteristics and applications. 1. Mill Edge: This is the most common type of steel coil edge. It is produced by cutting the coil at the mill and does not undergo any additional processing or treatment. Mill edge coils have a natural, slightly rounded edge, which makes them suitable for a wide range of applications. 2. Slit Edge: Slit edge coils are created by cutting the coil along its width using a slitting machine. This process results in a straight and smooth edge, making them ideal for applications that require precise measurements, such as automotive parts or electrical components. 3. Deburred Edge: Deburred edge coils have undergone an additional process to remove any burrs or sharp edges that may be present after slitting. This makes them safer to handle and reduces the risk of damage during fabrication or installation. Deburred edge coils are commonly used in the construction industry, especially for structural steel components. 4. Rounded Edge: As the name suggests, rounded edge coils have a rounded edge profile. This type of edge is achieved through a specific rolling process that creates a smooth and curved edge. Rounded edge coils are often used in applications where safety is a concern, such as in the manufacturing of household appliances or kitchen equipment. 5. Sheared Edge: Sheared edge coils are produced by cutting the coil with shearing blades, resulting in a straight edge with a slight burr. While sheared edge coils may have a rougher finish compared to other types of edges, they are still commonly used in applications that do not require a high level of precision, such as general fabrication or shelving. Overall, the choice of steel coil edge depends on the specific requirements of the application, including factors such as measurement precision, safety considerations, and aesthetic preferences.

Q: How do steel coils contribute to the HVACR industry?: Steel coils play a crucial role in the HVACR (Heating, Ventilation, Air Conditioning, and Refrigeration) industry by serving as a primary component in various applications. These coils are typically made from a durable and corrosion-resistant material, such as stainless steel or galvanized steel, which ensures their longevity in demanding HVACR environments. One of the most common uses of steel coils in the HVACR industry is in air conditioning systems. These coils are responsible for transferring heat between the refrigerant and the surrounding air. The coils, often referred to as evaporator coils, absorb heat from the indoor air, cooling it down and removing moisture. They then release the heat outside through a condenser coil, allowing for efficient cooling and dehumidification of the air. Steel coils are also utilized in heat exchangers, which are vital components in HVACR systems. Heat exchangers transfer thermal energy between two fluids, allowing for efficient heating or cooling. Steel coils, often in the form of finned tubes, provide a large surface area for heat transfer and help enhance the overall efficiency of the system. Furthermore, steel coils are extensively used in the construction of ductwork, which is the network of channels that distribute conditioned air throughout a building. These coils are formed into various shapes and sizes to fit specific ductwork designs, ensuring optimal airflow and temperature control. Additionally, the durability and strength of steel coils make them suitable for withstanding the pressure and forces exerted by airflows in duct systems. In refrigeration systems, steel coils are integral to the process of transferring heat out of an enclosed space, such as a refrigerator or freezer. The coils, often referred to as condenser coils, release heat from the refrigerant as it changes from a high-pressure gas to a high-pressure liquid. This allows for the cooling and preservation of perishable goods, making steel coils essential in the food service and cold storage industries. Overall, steel coils contribute significantly to the HVACR industry by enabling efficient heat transfer, optimal temperature control, and reliable operation of various HVACR systems. Their durability, corrosion resistance, and versatility make them a crucial component in providing comfortable and controlled environments in residential, commercial, and industrial settings.

Q: How are steel coils inspected for surface defects using non-destructive testing methods?: Steel coils are inspected for surface defects using non-destructive testing (NDT) methods to ensure their quality and integrity. There are several common NDT methods employed in this process. One of the most widely used methods is visual inspection, where trained inspectors visually examine the surface of the steel coils for any visible defects such as scratches, cracks, pits, or corrosion. This method is relatively simple and cost-effective but is limited to detecting only surface-level defects. Another commonly used NDT method is magnetic particle testing (MT). This method utilizes the principles of magnetism to identify surface and near-surface defects in ferromagnetic materials like steel. A magnetic field is applied to the steel coil, and iron particles are applied to the surface. If there is a defect, such as a crack or discontinuity, the iron particles will concentrate around it, making the defect visible to the inspector. Liquid penetrant testing (PT) is another NDT method used to inspect steel coils for surface defects. In this method, a liquid penetrant is applied to the surface of the coil. The penetrant is drawn into any surface defects by capillary action. After a certain period, excess penetrant is removed, and a developer is applied. The developer draws out the penetrant from any defects, making them visible to the inspector. Ultrasonic testing (UT) is a widely used NDT method that can detect both surface and subsurface defects in steel coils. High-frequency sound waves are transmitted into the steel coil, and the reflected waves are analyzed to identify any abnormalities. This method can detect defects such as cracks, inclusions, and voids that may not be visible to the naked eye. Additionally, eddy current testing (ECT) is another NDT method used for inspecting steel coils. This method utilizes electromagnetic induction to detect surface and near-surface defects. A coil carrying an alternating current is placed near the surface of the coil being inspected. Any changes in the coil's electrical conductivity caused by surface defects are detected and analyzed, allowing the inspector to identify and evaluate the severity of the defects. In conclusion, steel coils are inspected for surface defects using various non-destructive testing methods such as visual inspection, magnetic particle testing, liquid penetrant testing, ultrasonic testing, and eddy current testing. These methods ensure the quality and integrity of the steel coils before they are used in various applications.

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